/* <!-- copyright */
/*
 * aria2 - The high speed download utility
 *
 * Copyright (C) 2006 Tatsuhiro Tsujikawa
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 *
 * In addition, as a special exception, the copyright holders give
 * permission to link the code of portions of this program with the
 * OpenSSL library under certain conditions as described in each
 * individual source file, and distribute linked combinations
 * including the two.
 * You must obey the GNU General Public License in all respects
 * for all of the code used other than OpenSSL.  If you modify
 * file(s) with this exception, you may extend this exception to your
 * version of the file(s), but you are not obligated to do so.  If you
 * do not wish to do so, delete this exception statement from your
 * version.  If you delete this exception statement from all source
 * files in the program, then also delete it here.
 */
/* copyright --> */
#include "Metalinker.h"
#include "MetalinkEntry.h"
#include <algorithm>

namespace aria2 {

Metalinker::Metalinker() {}

Metalinker::~Metalinker() {}

class EntryQuery:
    public std::unary_function<SharedHandle<MetalinkEntry>, bool> {
private:
  std::string version;
  std::string language;
  std::string os;
public:
  EntryQuery(const std::string& version,
             const std::string& language,
             const std::string& os):
    version(version),
    language(language),
    os(os) {}

  bool operator()(const SharedHandle<MetalinkEntry>& entry) const {
    if(!version.empty()) {
      if(version != entry->version) {
        return false;
      }
    }
    if(!language.empty()) {
      if(!entry->containsLanguage(language)) {
        return false;
      }
    }
    if(!os.empty()) {
      if(!entry->containsOS(os)) {
        return false;
      }
    }
    return true;
  }
};

void Metalinker::queryEntry
(std::vector<SharedHandle<MetalinkEntry> >& queryResult,
 const std::string& version,
 const std::string& language,
 const std::string& os) const
{
  std::remove_copy_if(entries_.begin(), entries_.end(),
                      std::back_inserter(queryResult),
                      std::not1(EntryQuery(version, language, os)));
}

} // namespace aria2
